Percolator-pump.



J. B. GRIFFIN.

PERCOLATOR PUMP.

APPLICATXON FILED APR-16.1915.

wmm. Patented Apr. 25,1916.

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TE BTAEB BANT JOHN B. GRIFFIN, OF PLYMOUTH, MICHIGAN, ASSIGNOR TOLANJDERS, FRARY & CLARK, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OFCONNECTICUT.

PERCOLATOR-PUMP.

Application filed April 16, 1915.

To all whom it may concern Be it known that I, JOHN B. GRIFFIN, acitizen of the United States, residing at Plymouth, county of Wayne,State of Michigan, have invented a certain new and useful Improvement inPercolator-Pumps, and declare the following to be a full, clear, andexact description of the same, such as will enable others skilled in theart to which it pertains to make and use the same, reference being hadto the accompanying drawings, which form a part of this specification.

My invention relates to percolator pumps and consists in the form ofmounting of the valves therein which mounting is an improvement upon theconstruction shown in an application filed by me March 13, 1914, SerialNumber 824,351. The construction in said application was such that thetwin valves were pivoted upon a single pin, in such a manner that theirweight acted to close the valves, the center of gravity of each valvebeing upon either side of the supporting point of the pin. This made ajoint at the pin and made the valves operate somewhat rigidly, inasmuchas there was no special lost motion at the pin upon which they weresupported and it also made them difiicult to clean.

The object of my present invention is to avoid these difficulties andrender the valve self-cleaning, although employing the same fundamentalprinciple of gravity to close the valve. I accomplish this object by themechanism hereinafter shown and described.

In the drawingsFigure 1, illustrates a coffee pot with a percolator pumpin position showing the general action thereof. Fig. 2, is a verticalsection at right angles .to the supporting pins of the valve of the pumpstructure. Fig. 3, is a cross-section of Fig. 2 on the line X-X. Fig. 4,is a vertical section at right angles to that of Fig. 2.

In the drawings, A represents the bowl of the coffee pot; B is thepercolator pump, as a whole, divided however into two sections B and Bseparable at b by a telescoping joint. A well 0 is below the valves ofthe pump which are inclosed and shown in dotted lines at D. As thegeneral mode Specification of Letters Patent.

Patented Apr. 25, T9116.

Serial No. 21,625.

of operation is the same asin all percol pumps and common thereto, it isnot necessary to describe it in detail.

The valves E, E are shown and in Fig. 2 the valve E is shown closed overa perforation F, whereas the valve E is shown away from or opening theperforation F. In actual operation the valves open and closesimultaneously and not as shown in Fig. 2. They are shown in Fig. 2 inthe manner described for the purpose of illustration, it being notedthat the valve E is shown closed in dotted lines in said figure.

Upbn each side of the casing B there is a pair of projecting spur studsor rivets G, G which extend inwardly through the wall B far enough tosupport the hollow internal valves E, E, the rivet G being arrangedabove the rivet G. The valves are peculiarly shaped, as shown in Fig. 2,the convex side closely fitting the wall B, so that when against it, asshown at E, it practically closes the opening F so that it is liquidtight. Each side of the concavoconvex valves E, E is out out with anotch at E This notch enables the valves to fall inwardly against theprojection of the rivet or stud G, as shown in the position of the valveE. This permits the opening F to be utilized, but during the flow ofliquid upwardly, shown by the arrow impinging upon the inner side ofeach valve, forces them, in addition to their weight, over against theiropening and closes it as shown by the valve E. The valves are supportedby the lower stud G, the shell of the valve resting upon the projectionof such stud or studs upon either side of the casing B, as shown in Fig.2 and Fig. 4. The two studs together with the projections 6, e on thevalves retain the valves in position. The withdrawal or removal of oneof the studs, especially of the lower one G, will permit the valves tobe withdrawn from the casing B. It will be seen by this structure thatwhile the valves are held in position loosely, yet they are unable to bewithdrawn or to drop out of position so long as the studs Gr, G are inplace. It is further seen that there are no surfaces which are closedand kept in a closed position as joints in which sediment can collect,and it will be further seen that there ator are nopins crossing fromside to side of the casing as shown in my former application.

What I claim is:

1. In a percolator pump, the combination of a Vertical hollow memberhaving an opening near its bottom, a valve for swinging over saidopening to close the same by gravity, and means for providing a supportupon which said valve may swing and for limiting the opening of thevalve and preventing the valve becoming displaced, said means engagingonly the outer edge of said valve.

2. In a percolator pump, the combination of a vertical hollow memberprovided with an orifice in its side, a valve arranged to swing closedby gravity and. guard the said orifice, and two pairs of studsprotruding through the walls of said vertical hollow member, the upperpair for limiting the opening movement and displacement of said valve,and the lower pair to provide a support upon which said valve mayloosely swing, the said studs engaging the outer edges of said valve.

3. In a percolator pump, the combination of a vertical hollow memberprovided with an orifice in its side, a. valve arranged to swing closedby gravity to guard said opening, and two pairs of removable studsprojecting through the Wall of the vertical hollow member, the upperpair of which engage the edge of the valve to prevent its displacementand to limit the opening movement of the valve, and the lower pair ofremovable studs being arranged to engage with the outer edge of saidvalve to form a support upon which the valve may swing.

4. In a percolator pump, the combination of a vertical hollow memberprovided with an orifice in its side, a valve arranged to swing closedby gravity and guard said orifice, and two pairs of short studsinserted. a pair through each of two opposite sides of the verticalhollow member, the upper studs being arranged to engage with the edge ofthe valve to limit the opening movement and prevent the displacement ofthe valve, and the lower studs being arranged to engage the outer edgeof the valve to form a support upon which the valve may swing.

5. In a percolator pump, the combination of a vertical hollow memberprovided with an orifice in its side, a valve arranged to swing closedby gravity to guard the said orifice and provided with a pair of notchesin its outer edges, two pairs of studs arranged a pair on each side ofthe vertical hollow member and protruding through the same so that theupper members of the pairs are located to engage in the notches of thevalve when the valve swings open, thereby to limit the opening movementof the valve and prevent its displacement, and the lower studs arelocated to form a support for the edge of the valve upon which the valvemay swing.

In testimony whereof, I sign this specification.

JOHN B. GRIFFIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

